Don't come now and do this to your little sister who didn't even care about you.

Jimin, now a successful Hallyu star, and his younger sister, Park Yeo-ju. Yeo-ju, however, ran away from home as a child due to her parents' discrimination. Her parents lied to her, believing her younger sister had died in an accident. Yeo-ju encounters her on the street. But Yeo-ju hates Jimin. Yeo-ju tries to avoid them at all costs, and Jimin, feeling guilty, approaches her to apologize. Will their ending truly be a happy one?